Loading...
HomeMy WebLinkAbout4238-7 CONCRETE 2. All liquid curing compounds shall be used in accordance with the manufacturer's recommendations and shall not be used on surfaces receiving concrete hardener. i�� PART_1 -SCOPF O_E_WORK 4.10 DEFECTIVE CONCRETE Ai0V,C 1.01 WORK INCLUDED A. Concrete which is not in accordance with these specifications,out of line, level, or plumb; _-�_� Work includes,but is not limited to the following:Furnish all labor and materials, appliances,tools, showing structural cracks, rock pockets, voids, spalls, honeycombing,exposed glib. equipment,facilities, transportation, and services necessary for installing all concrete work complete as reinforcing or other damaged surfaces shall be considered as defective. ): %....0 indicated on the drawings and specifications including,but not limited to: '1 B. All fines and irregularities shall be removed from exposed concrete surfaces while the concrete is still green. Where patching is required, all loose and uniform concrete shall be A. Furnish and set all reinforcing steel,bolts and anchors. removed prior to patching. II RCHITERRA B. Install all items required by other trades which are to be cast into concrete. 4.11 CONCRETE FINISHES f C. Concrete mow curbs, banding,poured in place walls,other flatwork,footings, Rat surfaces shall be screeded to the required levels and slopes and then anyexcess water or laitance pans and slabs for:walls,fencing,benches, controllers,decks,etc., where removed. Concrete shall be compacted with agrid tamper and then floated ta true and level surface within DESIGN~GROUP applicable. p the tolerance of 1/8-inch along a 10-inch straight edge. Contractor shall ensure positive drainage on all PART-2 C_.ENERAL flatwork. See Plans for conc•-ete finish in landscape areas. LANDSCAPE 4.12 EXPANSION JOINTS ' ARCHITECTURE All requirements of subsection 3.31, standard specifications for Public Works Construction, shall apply except as specified herein. Placement of expansion joints shall be as directed and determined by layouts of slab markings noted on SITE PLANNING 2.1 INSPECTION OF SITE joints shall be recessed one-quarter inch from finish surface and sealed with a bead of grey thiokol sealant 10221-A Trademark Street or equal. Silica sand to match concrete color shall then be tamped into thiokol bead. Rancho Cucamonga, CA 91730 (909) 484-2800 Examine related work and surfaces before starting work in this section. Report to the Landscape Architect Fax (909) 484-2802 in writing,site conditions which will prevent the proper provision of this work. Beginning the work in this 4.13 CONTROL JOINTS .•""*"•, ., a Richard Krumwloda section without reporting unsuitable conditions to the Landscape Architect constitutes acceptance of site e ; CA Lie.#2834 conditions by the Contractor. Any required removal,repair, or replacement of this work caused by Control joints and other edges shall be formed in fresh concrete using a clean edging or jointing tool to e Gr ; AZ Lie.#29115 unsuitable conditions shall be done at no additional cost to Owner. provide a smooth uniform finish. .N �,• N1/Lic.#448 r'e•..•' TX.LI c.# 1884 2.2 PROTECTION OF EXISTING CONDITIONS 4.14 PROTECTION LTAISEALII= Contractor shall acquaint himself with all site conditions. He shall take necessary precautions to protect All finished concrete work shall be barricaded to pedestrian traffic for three(3)days. Barricades shall be pS CA p existing site conditions. Should damage be incurred,this Contractor shall repair damage to its original placed immediately after concrete finishing. Contractor shall furnish, place and remove all of his own ‘,PN F,9 condition or furnish and install equal replacement at his own expense,to the satisfaction of the Owner. barricades.Contractor shall be responsible for any damage to new construction and replacement of repair of tp� • um*/a '90 the work shall be made without added cost to Owner. ? ,A as yi, 2.4 COORDINATION iv it, cl 01 4.15 PATCHING , ►� 03 cl A. Cooperation On-Site;Coordinate and cooperate with other contractors to If patching is necessary and permissible, a bonding agent such as Weld-Crate,or equal,shall be used. 81011 •r• enable the work to proceed as rapidly and as efficiently as possible. * -31-08•t• .* 4.16 CONCRETE CURBS N -C • t� B. Work With Other Trades;Coordinate with General Contractor items of other �,� o•t• �� trades to be embedded; built-in, attached to, or supportand set in place. Such ed portions worlr work as k shall be all or in Construct concrete the local or at Usecations naturalshownrePortland cement corled,true to line and n rete,2000 PSI compressive ve siras en th.oved by rF Op C A1.�F// partpp by County City. grey P 9 executed by them in ample time that progress of the work is not delayed. Locate expansion joints as detailed or shown, and as directed, at intervals not to exceed fifteen feet(15'). Any cutting or patching made necessary to comply with this injunction shall Finish with steel trowel,then brush with bristle brush parallel to face or edge. II PROJECT]/LCUENT, be done at the Contractor's expense. 4.17 CLEAN-UP ■n 2.5 APPROVAL Upon completion of all concrete work and before final acceptance,Contractor shall remove all tools,surplus V materials, apparatus,debris, etc.,from the site and the site shall be left in a clean,neat condition Z Wherever the terms"approve," "approval,"or"approved"are used in the Specifications,they mean approval acceptable to Owner. of the Landscape Architect, the Owner's Representative or their field representatives,or in writing. 2.6 SUBMITTALS PART 5- WARRANTIFS (1 CD In addition to manufacturers'guarantees or warranties,all work shall be warranted for one year from the date At least 10 days after award of contract,Contractor shall submit for approval samples and/or of final acceptance against all defects in materials and workmanship by contractor.Warranty shall also Q manufacturers'latest catalog cuts and specifications of the following prior to beginning work. Approved cover repair of damage to any part of the premises resulting from defects in materials and workmanship to I UJ O samples shall be standards for completing work. the satisfaction of the Owner. ! CC O A. One 2-ft. x 2-ft. x 2-in. sample for each type of concrete finish and color at the job site. X 1111 Q T END OF SECTION • it w I- B. Color samples for expansion joint compounds. C. All submittal data shall be forwarded in a single package to the Landscape Architect within < W SITE CARPENTRY 15 days after award of the GeneralContract unless otherwise approved by the Landscape ir-- Architect and/or Owner's Construction Representative. < U 2 w CV co PART 1 -SCOPE OF WORK (/) 0 rn 2.7 SUBSTITUTIONSNI = H Q Contractor shall provide all materials and work necessary to furnish and install complete and in place all site (� Z 0C/)0 Standards; Specific reference to manufacturers'names and products specified in this carpentry work shown on the Drawings and Specifications herein. Y.- # < Z section are used as standards;this implies no right to substitute other material or methods without written approval of the Landscape Architect. 1.01 WORK INCLUDED <Q 0 z B. Approval; Installation of any approved substitutions is Contractors's responsibility. Any Perform all work necessary and required for the construction of wood structures and devices as indicated IliQ< Z i0 changes required for installation of any approved substitution must be made to the on the Drawings. Such work includes, but is not limited to,the following: 0_Z satisfaction of Landscape Architect and without additional cost to Owner. Approval by V 4( 0 _,I-U Landscape Architect of substituted materials and/or dimensional drawings do not waive A. Miscellaneous light form work 4: W co these requirements. r W PART 3- MATFRIAI S B. Stairs -i in C. Decks 0 Lo N Materials shall be of first quality and of domestic manufacture as noted below: D, HeadersII- A. Portland cement shall conform to ASTM-C150,Type I or Type II. E. Overhead structures 0 B. Concrete aggregate shall conform to ASTM-C33. 1.02. RELATED WORK IN OTHER SECTIONS it C. Water shall be clean,free from strong acid, alkali, oil or organic matter. 1 The following items of associated work are included in other sections of these Specifications: LI D. Admixture for all formed concrete shall be SIKA Chemical Corp.'s"Plastiment", or approved equal, applied in strict accordance with manufacturer's directions. A. Painting E. Reinforcement: reinforcing steel ASTM-A15 and ASTM-A305.Wirefabric: ASTM-A185 PART 2-GENERAL F. Forms: 2.01 SUBMITTALS SHEETITITLE� 1. Lumber shall be"construction grade" Douglas fir. Submit color samples of all samples of all paints and stains to Landscape Architect for approval, 10 days prior to application. 2. Plywood for forming of concrete which is exposed shall be Plyform. All plywood used for forming shall be at least 5/8-inch thick and edge sealed. 2.02 STORAGE & HANDLING • G. Expansion joint filler shall conform with ASTM-D1751 (premolded). A. Storage; Lumber shall be stored in neat stacks at the site unless it is to be used CO PART 4-FXFCUT/D/�I immediately. All lumber shall be piled so that it may be readily inspected and shall be handled in a manner that will avoid injury or breakage. 0 4.01 CONCRETE DESIGN MIX B. Piling Wood/Protection;Structural timber shall be neatly piled on skids above ground and shall be protected from the sun when necessary to prevent warping. Treated lumber shall LLI A. Contractor assumes responsibility for the design mix and guarantees the specified be handled with rope slings. Cant hooks, peaveys, or other sharp instruments shall not be ultimate strength as indicated or specified herein. used in handling treated timber. Undue injury in handling will be cause for rejection. B. Concrete, minimum 28-day ultimate strength shall be 2000 PSI. PART - CO 3 MATERIALS C. Ready-mixed concrete shall conform to ASTM-C94. A. Grading standards; Redwood shall be in accordance with"Standard Specifications for Grades of California Redwood Lumber"graded under the rules of the Redwood Inspection 4.02 CONCRETE PROPORTIONS &CONSISTENCY Service. A. The proportions of aggregate to cement shall provide a dense mixture which will readily B. Lumber: 0 work into all corners of the forms and around all reinforcements without any segregation of 1. All lumber shall conform to the allowable characteristics permitted within the „� the materials, cause excess free water to collect on the surface or cause excessive applicable grading rules. No splits,checks, holes, decay or other irregularities bleeding of the forms. will be permitted except those characteristic of that grade. I B. The recommended practices of the American Concrete Institute shall be followed hall applicable procedures. The maximum slump shall not exceed(4")four inches for footings, 2. Unless otherwise indicated on Drawings or Specifications, lumber shall be either0 slabs on grade, and mass concrete;5 inches for foundation walls. redwood construction heart and/or douglas fir, resawn,with no exposed sapwood. 4.03 CONCRETE APPROVAL 3. Header;Construction heart grade redwood header and stake,where applicable. SAS or roughsawn as detailed. The concrete quality, proportions, consistency,etc.,is subject to the approval of Owner, and no changes . CC shall be made without prior written approval. C. Hardware: 4.04 FORMWORK 1. Galvanized;All hardware required for fabrication, including brackets, hangers, I hinges,fasteners, and nails shall be hot-dip galvanized. Screws, nuts, bolts,A. Forms for concrete work shall be either metal or wood. Forms that are warped or that do and washers shall be hot-dip galvanized or cadmium . • (I') not have a smooth straight upper edge shall not be used. Forms shall be set with the plated. upper edge of the board true to line and grade and shall be staked rigidly in place with 2. Additional Hardware;When shown on the plans and in addition to hardware, Z stakes set not more than four feet(4')apart so as to remain immovable throughout the structural members fabricated from steel, concrete,or other materials shall be construction. All forms shall be approved by Owner within a tolerance of one percent incorporated into the structure. (1%). All materials shall be accurately and separately weighted and mixing shall continue 0 until the distribution of material is uniform and the mass of concrete is homogeneous. PART 4-FXEC(JfION B. Two and one-half(2 1/2)gallons of water per cubic yard,shall be withheld from the mix at 4.01 QUALITY (tip the plant, and all or a portion may be added to the mix at the job site as directed by the Inspector. The concrete shall be mixed at least 5 minutes after such water is added and Workmanship shall be first-class throughout. All lumber shall be accurately cut and framed to a close fit and not less than 3 minutes of this time shall be immediately prior to the discharge of the shall have even bearing over the entire contact surfaces. All joints shall be square and tight unless batch. Total mixing time after adding original water shall be at least 15 minutes. otherwise shown. No shimming will be permitted in making joints. Work shall be free of hammer marks, C. Concrete which is not placed within 90 minutes after the introduction of cement and water, dents or other disfiguration. Nails to be seated flush unless otherwise shown. Unless otherwise indicated and concrete which has stood for 30 minutes after leaving the mixer,shall not be used. on Drawings, countersink finishing nails 1/16 inch. Unless otherwise indicated on drawings, holes for _REVISIONS' countersunk bolts shall be bored with a bit 1/6 inch larger than the accompanying washer and to a depth 4.05 REBAR which allows bolt head to be secured flush with finish surface of wood member. Holes for lag screws shall be same size as diameter of inner shank(bolt size minus depth of thread). n Reinforcing bar shall be spliced with 40 bar diamers minimum overlap. 4.02 HARDWARE .. 4.06 CONVEYING AND PLACING A. All bolts 5/8 inch and less in diameter shall be fitted with cut washers,and all bolts and lag A screws over 5/8 inch in diameter shall be fitted with cast or malleable iron washers,unless A A. Before pouring, all forms shall be thoroughly cleaned and made tight. The bottom of otherwise shown on the plans. trenches shall be wet down before pouring footings;earth shall not be muddy at the time of pouring. Concrete shall not be placed until reinforcements, rough hardware,and forms are B. All exposed hardware items shall be installed as hot-dipped galvanized unless otherwise approved by Owner. instructed on plan. B. Before depositing new concrete against old concrete, all laitance shall be removed, and 4.03 NAILING A the surfaces roughened to expose the embedded aggregate. The surfaces shall then be covered with cement grout,using the specified mix with 1/2 of the course aggregate When toe nailing of structural members is required,toe nailing shall be at an angle and penetration to firmly Aomitted, 1-1/2 inches thick. secure member. C. Conveying and placing of concrete shall be done so as to prevent separation of 4.04 EASED EDGES ingredients, and in no case shall the free fall exceed 6 feet. Tremies shall be used as required. Surfaces of concrete shall be kept reasonably level, with a minimum amount of DRAWN'BYMIll concrete being allowed to flow after being placed. Placing shall be performed as a Edges of seat decks, benches, handrails, planter caps and other exposed or leading corners are to be 0 continuous operation until each section is completed. eased. KPF W D. Concrete shall be spaded and vibrated with mechanical vibrators to a maximum 4.05 HEADERS Z subsidence, without separation of ingredients. The moving of concrete by vibration will CHECKED'BY' 8 not be permitted. Headers are to be installed in accordance with plans and details. p 4.07 COLORED CONCRETE 4.06 CLEANUP JRC Integral color and Dust-On color hardner shall be as specified on plans and details. All subcontractor's materials and tools of the trade shall be removed from the job site upon completion of DATE work.Subcontractor shall be responsible for damage to the finished surfaces of other work.Subcontractor 6 4.08 GROUTING guarantees all work will be performed in a good and workmanlike 4/9/07 manner. aA. Grout shall be composed of one part Portland Cement and two parts of fine aggregate by0 PART 5- WARRANTIES 2 volume. Materials shall be mixed dry and water added just sufficient to make the mixture SCALE ti flow under its own weight. In addition to manufacturers'guarantees or warl'anties all work shall be warranted for one year from the date � H of Final Acceptance against defects in materials and workmanship by Contractor. Warranty shall also cover F B. For dry tamp cement grout,a minimum of water shall be added to the mix so that when wet repair of damage to any part of the premises resulting from defects in materials and workmanship to the N/A 0 sample is squeezed hard in the hand,surface moisture, but no free water,shall appear on satisfaction of the Owner. , the sample. Do not mix more than can be used in 30 minutes. JOB NUMBER' 0 4.09 CURING AND PROTECTION END OF SECTION CITY OF FONTANA, CALIFORNIA c A. All exposed surfaces of concrete shall be protected from damage due to temperature, 0536-5 ' elements, and construction operations. g s B. Curing shall be as follows; DRAWN BY: SCALE: KPFSIERRA LAKES PKWY. MEDIANS SHEET.NUMBER ,, DESIGNED BY: T'ACT. # 17842 N/A ATE: 0 1. All exposed surfaces of concrete shall be protected form premature drying and COM Y FACILITIES DISTRICT E freshly placed concrete shall be protected against wash by rain. All concrete CONTRACTOR TO ALSO REFER TO THE CITY OF FONTANA KPF 3/22/07(BASE)E shall be kept wet for aperiod of ten days after placing. In order that curingwater $� P Y LANDSCAPE STANDARDS MANUAL FOR STREETSCAPES. CI-ECI¢D BY: (' APP -• BY: / DM.NO.: 7 .a may reach both surfaces of walls,the forms shall be loosened and water shall be / DATE' 4238 e poured over the tops of the walls and allowed to run down between the concrete REV REVISION DESCRIPTION DATE CITY DATE JRC/KPF ( 8 7 OF 8 SHTS. and the forms. Cf(Y ENGINEER R.C.E 51152 EXP.DATE 12/31/07 I